The tests used in standards for evaluating smoke alarms were developed back in the 1980s. However, despite changes in building materials since then, smoke alarms remain reliable, says Chagger: "They still respond to all the main fires we get today."
The Shark app, however, prompts you to start a cleaning session and then asks you to select your cleaning preferences. The extra features are somewhat hidden or hard to find, unlike other apps, but this is an issue that can be fixed with app updates.
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